From d58ceae022ad887686e55068db7229f931eb96af Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Wed, 26 Feb 2014 18:45:26 +0100
Subject: [PATCH] Test nix-env --switch-generation

---
 tests/user-envs.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/tests/user-envs.sh b/tests/user-envs.sh
index ab445a8ee..0d997acd6 100644
--- a/tests/user-envs.sh
+++ b/tests/user-envs.sh
@@ -86,7 +86,9 @@ if nix-env -q '*' | grep -q foo; then false; fi
 nix-env -q '*' | grep -q bar
 
 # Rollback: should bring "foo" back.
+oldGen="$(nix-store -q --resolve $profiles/test)"
 nix-env --rollback
+[ "$(nix-store -q --resolve $profiles/test)" != "$oldGen" ]
 nix-env -q '*' | grep -q foo-2.0
 nix-env -q '*' | grep -q bar
 
@@ -99,6 +101,10 @@ if nix-env -q '*' | grep -q bar; then false; fi
 nix-env --list-generations
 test "$(nix-env --list-generations | wc -l)" -eq 7
 
+# Switch to a specified generation.
+nix-env --switch-generation 7
+[ "$(nix-store -q --resolve $profiles/test)" = "$oldGen" ]
+
 # Install foo-1.0, now using its store path.
 nix-env -i "$outPath10"
 nix-env -q '*' | grep -q foo-1.0